Apparatus for the decomposition of complex hydrofluoric salts



July 18, 1933. BUCHNER 1,918,377

APPARATUS FOR THE DECOMPOSITION OF COMPLEX HYDROFLUORIC SALTS OriginalFiled July 26 1927 sodium fluoride. I

to attain this aim. In the apparatus Patented July is, 19 3f:

MAXJIBUCHNER, or HANovER-irLE rE I'Jn; eiimvmniz arrana'ros FOR THEnEcoMrosrrIoN' or COMPLEX iii nnortuoiiro snmsf 7 Original applicationme'ajmy as, 1927, Serial No; 208,607," as i Germ ny Ju'1 "27, i926.

this application filed February 12, 1930. Serial No. 427,965.

I This'invention for the decomposltionof complex hydrofluoric salts bythermic treatment,and is a division of my application #208,697, iiledJuly,

26, 1927. The decomposition of complexhydrofiuoric salts, such assodiumsilicofiuoride, potassium silicofiuoride, barium silicofluoride and 3 ithe like by insurmountable difficulties, as it was notpos I sible, to,

heatinghas heretofore presented for instance, completely convert sodiumsilicofiuoride into silicon fluoride and By the invention itbecomespossible, which will be hereinafter described and are diagrammaticallyshown by way of example in the "accompanying drawing,a practicallyperfect decompositioniis obtained. 1

- directly or by radiation.

M sodium silicofluoride, whenmovingalong the" i means for spreading'tion. The reaction space or The characteristic feature of the new apv vcomplex hydrofluoric salts, comprising; a I

deviceforsupplying V t-hematerial to' above the center of said rotary Ii cone, heatingfdevices below saidkirotary cone,

v a housing enclosing saidrotary cone'and said a discharge onthe lowerporl paratus' is a separategrea'ction space, in'which the material to bedecomposed 1s continually spread 1n thin layers which the material to bedecomposed is charged being in movement and the heat nec-. essary forthe decomposition being supplied The new apparatus is shown byway ofexample in the figure.

a is a conical rotary from below either directly bymeansof a gas supplyvh or indirectly by means of radiating ,bricks c. The dischargingoftheg'ases from combustion is effected through pipe d ffrom the conicalbody so that these gases do not come into touch with the material tobedecomposed. a v 1 r The material is supplied at 6, drops around thechimney in beingpreliminarily heated and distributes itself over theconealong the dash lines and accordingto the direction of'the arrow. 7The angle of inclination and the revolving speed of the cone have to beregulated so that the material to be decomposed, i. e.

cone, is completely decomposed.

f The solid portion ofthemate'rial drops aroundthe cone into thedischarge funnel f.

The housing 9 enclosing the cone holds torelates to apparatus suitedcilitated.

"rotary cone, a charging during the decomposi the surface on body whichis a complex hydrofluoric-salts, tary cone, a charging device forsupplyingthe of said housing product from decomposition.

3. Apparatus for thedecomposition Divided "and 4'] I gether' thegaseous" components which are dis-;

charged through thepipe h.

Atsuitable points 'admission'openings for i a diluting gas may 7discharging of the volatile"fluoride is fa;

I The space above the conical body, as shown 1n the drawing, for

shape. In .any case it the rotary body.-

be arranged, so that the. p 55 3 I which however a-plane* i Q 1 platemay belsubstituted might be'ofi' shaft f 60 the material to beheatedonto the center of [Instead of heating by gas or I bricks as indicatedin the figure,;,h-eating by electric heating bodiesor by radiating heatr; from above upon totheinateriahto be de com-posed may be applied.llclaimaf' 1. Apparatus" for the, decompositionmot heating devices,

solid product from decomposition, andya dis-I charge on the upperportion oi said housing" V for discharging the gaseous product from de-f1 2? J decompositionof 1 comprising, a rocomposition. 2. Apparatus, forthe material to above the "center of said rotary cone, heating'devices'above said rotary cone,

{adapted tof transmit heat to the material by 3 1 radiation, ahousingenclosing' said rotarycone and said heating devices, adischargeon the lower portionof said housing for the dis} charge of the solidproduct from decomposi tion, and a discharge onnthe' upperfp'ortioncomprising complex hydrofluoric salts a refor discharging thegaseousaction chamber provided withia rotary platen v the; material to be .de-

composed continually infthin layers on. the

f=plateandmeansfor'heating the'material indirectly.

directly. v

p '5. Apparatus for the decomposition of a complexhydrofluoric salts,comprising a reaction chamber provided with a rotary plate, means forspreading the material to be decomposed; continually in thin layers onthe (7 radiation. v

6.-Apparatnsi for the decomposition of complex hydrofluoric salts,comprising a ire-V action chamber provided with aplate, rotary means forspreading the material to be decomposed continually in thin layerson theplate and means for he'atingthe material by plate and means for heatingthe material by" v radiation.

f'M'AX B C N RQ f

